syzbot

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BUG: KCSAN: data-race in mem_cgroup_flush_stats_ratelimited / tick_do_update_jiffies64

read-write to 0xffffffff868099c0 of 8 bytes by interrupt on cpu 1:
 tick_do_update_jiffies64+0x112/0x1b0 kernel/time/tick-sched.c:118
 tick_sched_do_timer kernel/time/tick-sched.c:232 [inline]
 tick_nohz_handler+0x7c/0x2d0 kernel/time/tick-sched.c:290
 __run_hrtimer kernel/time/hrtimer.c:1791 [inline]
 __hrtimer_run_queues+0x221/0x5f0 kernel/time/hrtimer.c:1855
 hrtimer_interrupt+0x235/0x4a0 kernel/time/hrtimer.c:1917
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 console_flush_all+0x590/0x7a0 arch/x86/include/asm/irqflags.h:-1
 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
 console_unlock+0xf4/0x350 kernel/printk/printk.c:3325
 vprintk_emit+0x470/0x6c0 kernel/printk/printk.c:2450
 vprintk_default+0x26/0x30 kernel/printk/printk.c:2465
 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82
 _printk+0x7f/0xb0 kernel/printk/printk.c:2475
 mem_cgroup_print_oom_meminfo+0x76/0x230 mm/memcontrol.c:1572
 dump_header+0xa5/0x2d0 mm/oom_kill.c:469
 oom_kill_process+0x341/0x4c0 mm/oom_kill.c:1040
 out_of_memory+0x9d1/0xc20 mm/oom_kill.c:1178
 mem_cgroup_out_of_memory+0x13f/0x190 mm/memcontrol.c:1647
 mem_cgroup_oom mm/memcontrol.c:1670 [inline]
 try_charge_memcg+0x5a3/0x820 mm/memcontrol.c:2327
 try_charge mm/memcontrol-v1.h:19 [inline]
 charge_memcg+0x50/0xc0 mm/memcontrol.c:4518
 mem_cgroup_swapin_charge_folio+0xd0/0x150 mm/memcontrol.c:4604
 __read_swap_cache_async+0x242/0x490 mm/swap_state.c:517
 swap_cluster_readahead+0x27f/0x400 mm/swap_state.c:683
 swapin_readahead+0xe6/0x6f0 mm/swap_state.c:881
 do_swap_page+0x31c/0x2510 mm/memory.c:4425
 handle_pte_fault mm/memory.c:5893 [inline]
 __handle_mm_fault mm/memory.c:6033 [inline]
 handle_mm_fault+0x8f9/0x2b30 mm/memory.c:6202
 do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
 handle_page_fault arch/x86/mm/fault.c:1480 [inline]
 exc_page_fault+0x3b9/0x650 arch/x86/mm/fault.c:1538
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623

read to 0xffffffff868099c0 of 8 bytes by task 4239 on cpu 0:
 mem_cgroup_flush_stats_ratelimited+0x29/0x70 mm/memcontrol.c:640
 count_shadow_nodes+0x6b/0x230 mm/workingset.c:680
 do_shrink_slab+0x5e/0x6a0 mm/shrinker.c:384
 shrink_slab_memcg mm/shrinker.c:550 [inline]
 shrink_slab+0x4f2/0x860 mm/shrinker.c:628
 shrink_node_memcgs mm/vmscan.c:5953 [inline]
 shrink_node+0x647/0x1da0 mm/vmscan.c:5992
 shrink_zones mm/vmscan.c:6237 [inline]
 do_try_to_free_pages+0x3c8/0xc60 mm/vmscan.c:6299
 try_to_free_mem_cgroup_pages+0x1e6/0x4a0 mm/vmscan.c:6631
 try_charge_memcg+0x368/0x820 mm/memcontrol.c:2285
 obj_cgroup_charge_pages+0xc0/0x1a0 mm/memcontrol.c:2666
 __memcg_kmem_charge_page+0x9d/0x170 mm/memcontrol.c:2693
 __alloc_frozen_pages_noprof+0x1d1/0x340 mm/page_alloc.c:4823
 alloc_pages_mpol+0xb6/0x260 mm/mempolicy.c:2301
 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline]
 alloc_pages_noprof+0xe8/0x130 mm/mempolicy.c:2392
 vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0x6ea/0xe80 mm/vmalloc.c:3846
 __bpf_map_area_alloc kernel/bpf/syscall.c:396 [inline]
 bpf_map_area_alloc+0xd8/0x110 kernel/bpf/syscall.c:403
 array_map_alloc+0x1c2/0x3a0 kernel/bpf/arraymap.c:141
 map_create+0x881/0xba0 kernel/bpf/syscall.c:1476
 __sys_bpf+0x6ac/0x800 kernel/bpf/syscall.c:5816
 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5939 [inline]
 __x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5939
 x64_sys_call+0x23da/0x2e10 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000ffff9ebf -> 0x00000000ffff9ec0

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 4239 Comm: syz.3.260 Not tainted 6.14.0-syzkaller-10892-g4e82c87058f4 #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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